隔热屏结构对喷管壁面冷却影响的数值模拟  

Numerical simulation of influence of heat shield structure on nozzle wall cooling

作　　者：侯圣文 王强[1] 胡海洋[1] 潘思霖 薄澜 HOU Shengwen;WANG Qiang;HU Haiyang;PAN Silin;BO Lan(School of Energy and Power Engineering,Beihang University,Beijing 100191,China;Shanghai Marine Diesel Engine Research Institute,Shanghai 201108,China)

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191 [2]上海船用柴油机研究所,上海201108

出　　处：《航空动力学报》2025年第1期78-89,共12页Journal of Aerospace Power

基　　金：国家科技重大专项(J2019-Ⅲ-0009-0053)。

摘　　要：以加力状态下的轴对称喷管为研究对象,数值对比研究了隔热屏翻边方式对喷管壁面冷却的影响。结果表明:无论对隔热屏进行两侧翻边还是出口翻边,隔热屏的最高温度和平均温度随着翻边高度的增加呈现先减小后增加的变化规律;对隔热屏进行两侧翻边会增加收敛段壁面的平均温度和最高温度。相反,出口翻边则会降低收敛段壁面的最高温度和平均温度;两侧翻边时,扩张段壁面最高温度和平均温度最多可以降低2.6%和1.1%。出口翻边时,扩张段壁面的最高温度和平均温度受翻边高度影响较大,分别最多可以下降14.6%和23.5%。当以喷管扩张段壁面的冷却为研究目标时,则出口翻边更有利于喷管壁面冷却。Using the axisymmetric nozzle under the afterburner as the research object,the effects of flanging methods of heat shield on nozzle cooling were studied numerically.The results show that regardless of whether the heat shield is flanged on both sides or at the outlet,the maximum and average temperatures of the heat shield show a pattern of first decreasing and then increasing with the increase of flanging height;flipping both sides of the heat shield can increase the average and maximum temperatures of the convergent section wall.On the contrary,outlet flanging can reduce the maximum and average temperatures of the convergent section wall;in case of flanging on both sides,the maximum and average wall temperatures of the divergent section can be reduced by up to 2.6%and 1.1%.During outlet flanging,the maximum and average temperatures of the divergent section wall are greatly affected,and can be reduced by up to 14.6%and 23.5%,respectively.When the cooling of the nozzle divergent section wall is taken as the research objective,the outlet flanging is more conducive to the cooling of the nozzle wall.

关 键 词：加力状态 轴对称喷管 隔热屏结构 喷管壁面冷却 推力系数 

分 类 号：V235.1[航空宇航科学与技术—航空宇航推进理论与工程]